Lenovo has warned ThinkPad owners that the August 11, 2020 Patch Tuesday update for Windows 10 version 2004 is causing Blue Screen of Deaths (BSODs) and breaks Windows Hello biometric login.
The issues affect Lenovo ThinkPads made in 2019 and 2020 and, according to a support article from Lenovo, stem from the Enhanced Windows Biometric Security setting in BIOS setup. The bug appears in the cumulative update KB566782 for Windows 10 version 2004, which included over 100 security patches as well as new security features for the OS.
After installing KB566782, users may notice BSODs when booting, when starting the Lenovo Vantage for updating drivers, or when running a Windows Defender scan, according to Lenovo.
Other symptoms include being unable to login using face authentication with Windows Hello, as well as errors in Device Manager that are related to both the Intel Management Engine CPU subsystem and the device's infrared camera.
Fortunately, Lenovo notes there is a solution: "Disable the Enhanced Windows Biometric Security setting in BIOS Setup -> Security -> Virtualization menu."